amazbackcom Ring Video Doorbell 4: 
- 1080p HD video doorbell with improved video previews and battery life.
- All-new Colour Pre-Roll Video Previews of all motion events means you’ll never miss a moment at your front door, day or night.
- Enjoy customisable privacy zones and audio privacy, enhanced dual-band (2.4 or 5.0 GHz) wifi connectivity, and improved motion detection.
- Receive real-time notifications on your phone or tablet whenever someone presses your doorbell, or if you're busy, save time and use Quick Replies to respond with a pre-selected message.
- Powered by a removable, rechargeable battery pack or connects to doorbell wires for constant power. Works on any home.
- With a Ring Protect Plan (subscription sold separately), record all your videos, review what you missed for up to 180 days, and share videos and photos.
